728550100 has 18 divisors (see below), whose sum is σ = 1580953934. Its totient is φ = 291420000.

The previous prime is 728550089. The next prime is 728550107. The reversal of 728550100 is 1055827.

It can be written as a sum of positive squares in 3 ways, for example, as 254530116 + 474019984 = 15954^2 + 21772^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728550107) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3642651 + ... + 3642850.

Almost surely, 2^728550100 is an apocalyptic number.

It is an amenable number.

728550100 is an abundant number, since it is smaller than the sum of its proper divisors (852403834).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

728550100 is a wasteful number, since it uses less digits than its factorization.

728550100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7285515 (or 7285508 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 28.

The square root of 728550100 is about 26991.6672326850. The cubic root of 728550100 is about 899.8148178670.

The spelling of 728550100 in words is "seven hundred twenty-eight million, five hundred fifty thousand, one hundred".